CN116169327A - Anode purging control method and device, electronic equipment and fuel cell - Google Patents
Anode purging control method and device, electronic equipment and fuel cell Download PDFInfo
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- CN116169327A CN116169327A CN202310450707.1A CN202310450707A CN116169327A CN 116169327 A CN116169327 A CN 116169327A CN 202310450707 A CN202310450707 A CN 202310450707A CN 116169327 A CN116169327 A CN 116169327A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04179—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by purging or increasing flow or pressure of reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04358—Temperature; Ambient temperature of the coolant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04574—Current
- H01M8/04589—Current of fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04634—Other electric variables, e.g. resistance or impedance
- H01M8/04656—Other electric variables, e.g. resistance or impedance of auxiliary devices, e.g. batteries, capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04723—Temperature of the coolant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides an anode purging control method, an anode purging control device, electronic equipment and a fuel cell, and belongs to the technical field of fuel cells, wherein the method comprises the following steps: under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation, according to the operation parameters of the fuel cell, under the condition that the state of warmup is not completed, the first preset duration of purging the anode of the fuel cell is prolonged again to the first target duration, so that the anode is purged. According to the anode purging control method, the operation parameters of the high-power fuel cell in the operation process are monitored, the abnormal warming up of the fuel cell in the operation process after the fuel cell is started is accurately identified, the anode purging time of the electric pile is prolonged by combining the thermal characteristics of cooling water, hydrogen, air and moisture in the electric pile, the water content in the electric pile is reduced, the working performance of the fuel cell under the working condition of the next stage is further improved, and the service life requirement of a fuel cell system is further met.
Description
Technical Field
The present invention relates to the field of fuel cell technologies, and in particular, to an anode purge control method and apparatus, an electronic device, and a fuel cell.
Background
The hydrogen fuel cell is an electrochemical power generation device which uses hydrogen and oxygen as raw materials to perform electrochemical reaction to generate water and convert chemical energy into electric energy. Water generated by the electrochemical reaction at low temperatures can freeze and can lead to rapid degradation or damage to the fuel cell system performance. Under the low temperature condition, more water vapor is easy to remain in the fuel cell, so that the humidity in the electric pile is abnormal, and the normal operation of the fuel cell is also influenced. For the anode of the fuel cell, after the fuel cell is stopped, the air on the cathode side is easy to diffuse to the anode containing hydrogen, and the anode is easy to cause the dissociation of the catalyst carbon carrier due to the existence of the air, so that the catalyst is lost, and the material inside the fuel cell is damaged.
The prior solution mainly uses the gas corresponding to the anode to purge the anode when the fuel cell is started and shut down so as to reduce the water content of the membrane electrode of the fuel cell, thereby reducing the formation of solid ice and ensuring that the anode does not contain air. In addition, after the startup operation, the electric pile and the internal polar plates and the membrane electrodes thereof can be preheated in a mode of electrically heating cooling water by an external power supply, so as to realize the warm-up of the electric pile.
Aiming at a high-power fuel cell system, a system mass and heat transfer model can be established from the angles of system operation temperature, whole vehicle heat dissipation integrated design and power system energy management, the environmental adaptability of the system operation condition is widened, the system power response is further optimized globally, the high-temperature operation scene requirement is effectively reduced, the working performance of the fuel cell is further guaranteed, and the service life is prolonged. However, when the high-power fuel cell has the abnormal conditions of startup and shutdown and operation, the purging during startup and the warming up during startup may not be affected and not completed, so that the purging and warming up operations of the anode do not reach the required effects, and the water content in the fuel cell may be too high. Even if purging or warming-up is adopted under the working condition of the next stage, the effect is limited, and the working performance of the fuel cell under the working condition of the next stage is also influenced by the higher water content. Therefore, how to regulate the anode purging process in the startup and shutdown process, so that the fuel cell can work normally under the working condition of the next stage is a problem to be solved.
Disclosure of Invention
The invention provides an anode purging control method, an anode purging control device, electronic equipment and a fuel cell, which are used for solving the defect that the abnormal operation of water discharge operation is difficult to identify in the prior art and realizing the effect that the fuel cell can normally work under the working condition of the next stage.
The invention provides an anode purging control method, which comprises the following steps:
determining the current working condition and the front working condition of a fuel cell, wherein the working conditions of the fuel cell comprise startup, shutdown and operation;
determining the operation parameters of the fuel cell under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering a pile under different operation moments, and the output current and the electric density of a heating machine under different operation moments;
determining a warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed;
when the warmup state of the output current is a state of incomplete warmup, the first preset duration of purging the anode of the fuel cell is prolonged again by a first target duration so as to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the running time, the temperature of cooling water entering the electric pile at different running moments, and the output current and the heating current density at different running moments;
Determining a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on the current temperature of the fuel cell, the ambient temperature, a target shutdown time, and a temperature drop characteristic curve of the fuel cell at the ambient temperature under the condition that purging of the anode is completed; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity; and controlling a heating system of the fuel cell to heat the fuel cell after purging the anode under the condition that the second temperature value is smaller than the third temperature value, so that the temperature of the fuel cell after the target shutdown time is larger than or equal to the third temperature value.
According to the anode purging control method provided by the invention, the method for determining the warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering a pile under different operation moments and the output current under different operation moments comprises the following steps:
Determining a time when the output current is greater than zero for the first time in the running time as a first time;
determining a target temperature of cooling water entering the stack at the first time;
when the target temperature is greater than a first temperature value, determining a warmup state when the output current is pulled to be a warmup completion state; and determining a warmup state when the output current is pulled as a state in which warmup is not completed when the target temperature is less than or equal to the first temperature value.
According to the anode purge control method provided by the invention, after determining the warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments, the method further comprises:
and when the warmed-up state when the output current is pulled is a warmed-up state, purging the anode of the fuel cell according to the first preset duration.
According to the anode purging control method provided by the invention, when the warmed-up state when the output current is pulled is a state that does not complete the warmup, a first preset duration of purging the anode of the fuel cell is prolonged for a first target duration, so as to purge the anode, and the anode purging control method further comprises:
Acquiring the hydrogen pressure and the air pressure in the bipolar plate of the fuel cell;
and adjusting working parameters of a hydrogen pressure valve and an air compressor of the fuel cell based on the hydrogen pressure and the air pressure so that a pressure difference between the hydrogen pressure purged to the anode and the air pressure of the cathode is smaller than a pressure difference preset value.
According to the anode purging control method provided by the invention, after the current working condition and the front working condition of the fuel cell are determined, the method further comprises the following steps:
determining a purging state of the fuel cell when the fuel cell is shut down under the condition that the current working condition of the fuel cell is started and the front working condition is shut down; the purging state of the fuel cell when the fuel cell is shut down comprises a purging completion state and a purging incompletion state;
under the condition that the purging state of the fuel cell is in a purging incomplete state when the fuel cell is shut down, a second preset duration of purging the anode of the fuel cell is prolonged again to a second target duration, so that the anode is purged; the second preset duration is the standard purging time of the anode of the fuel cell under the starting working condition; the second target duration is determined based on a shutdown duration of the fuel cell and an ambient temperature.
According to the anode purge control method provided by the invention, after the purge state of the fuel cell at shutdown is determined, the method further comprises:
and under the condition that the purging state of the fuel cell when the fuel cell is shut down is the purging completion state, purging the anode of the fuel cell according to the second preset duration.
The invention also provides an anode purge control device, comprising:
the first processing module is used for determining the current working condition and the front working condition of the fuel cell, wherein the working conditions of the fuel cell comprise startup, shutdown and operation;
the second processing module is used for determining the operation parameters of the fuel cell under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering a pile under different operation moments, and the output current and the electric density of a heating machine under different operation moments;
the third processing module is used for determining a warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed;
A fourth processing module, configured to, when a warmup state when the output current is pulled is a state that is not completed, extend a first preset duration for purging an anode of the fuel cell by a first target duration, so as to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the running time, the temperature of cooling water entering the electric pile at different running moments, and the output current and the heating current density at different running moments;
a fifth processing module configured to determine, when purging of the anode is completed, a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on a current temperature of the fuel cell, the ambient temperature, a target shutdown time, and a temperature drop characteristic curve of the fuel cell at the ambient temperature; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity; and controlling a heating system of the fuel cell to heat the fuel cell after purging the anode under the condition that the second temperature value is smaller than the third temperature value, so that the temperature of the fuel cell after the target shutdown time is larger than or equal to the third temperature value.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing any one of the anode purge control methods described above when executing the program.
The invention also provides a fuel cell comprising a galvanic pile and an electronic device as described above.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements an anode purge control method as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements the anode purge control method as described in any one of the above.
According to the anode purging control method, the anode purging control device, the electronic equipment and the fuel cell, provided by the invention, the operation parameters of the high-power fuel cell in the operation process are monitored, the abnormal warming-up of the fuel cell in the operation process after the fuel cell is started is accurately identified, the anode purging time of the electric pile is prolonged by combining the thermal characteristics of cooling water, hydrogen, air and moisture in the electric pile, the water content in the electric pile is reduced, the working performance of the fuel cell in the working condition of the next stage is further improved, and the service life requirement of a fuel cell system is further met.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of an anode purge control method according to the present invention;
FIG. 2 is a second schematic flow chart of the anode purge control method according to the present invention;
FIG. 3 is a schematic view of the structure of the anode purge control device provided by the invention;
fig. 4 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The anode purge control method, apparatus, electronic device, and fuel cell of the present invention are described below with reference to fig. 1 to 4.
As shown in fig. 1, the anode purge control method according to the embodiment of the present invention mainly includes step 110, step 120, step 130, step 140, and step 150.
The operating conditions of the fuel cell include power on, power off, and operation.
The most important working conditions of the fuel cell are startup, shutdown and operation. The fuel cell has high heat generation proportion, low temperature required by the cell stack material, extremely sensitive temperature and humidity of the reflecting film in the cell stack, and can carry out complex control operation on the fuel cell system in the starting, shutting down and running processes.
For example, under the operating condition, the characteristics of the relation between the water content and the impedance in the reaction membrane in the electric pile can be combined, a mass transfer and heat transfer model of the system can be established and perfected, and the multi-state multi-dimensional online measurement characterization can be performed under the operating condition of different output powers, so that the fuel cell system can stably operate at high temperature for a long time.
And under the working conditions of startup and shutdown, the anode can be purged by utilizing the reaction gas hydrogen of the anode to reduce the water content of the membrane electrode of the fuel cell, thereby reducing the formation of solid ice and ensuring that the anode does not contain air. When the electric pile is started, the whole car heat dissipation model can be built, based on physical characteristics such as heat dissipation fan hysteresis and heat dissipation loop thermal inertia, and the system water transmission characteristic, closed loop decoupling control of dynamic water temperature and hydrogen air path operation conditions is realized, so that optimal warm-up operation conditions such as warm-up water temperature and warm-up time are determined, and the water vapor and condensed water content in the electric pile is reduced by controlling the purging time of hydrogen and air.
In other words, the operations such as anode purge and the like need to be controlled in different modes under different working conditions.
It will be appreciated that the operating conditions of the fuel cell may be obtained directly by the controller of the fuel cell. Under the condition that the current working condition is shutdown and the front working condition is operation, the fuel cell is operated.
The fuel cell may or may not output power during operation. During operation of the fuel cell, if the fuel cell does not generate output power, a warm-up operation, a purge operation, a heating system or a cooling system operation, etc. may occur inside the fuel cell. During operation of the fuel cell, if the fuel cell generates output power, membrane reactions and the like also occur inside the fuel cell.
The operating parameters of the fuel cell may be recorded whenever the fuel cell is operating, whether or not the fuel cell is producing output power.
The operating parameters include the operating time of the fuel cell, the ambient temperature, the temperature of the cooling water entering the stack at different operating times, and the output current and the heating current density at different operating times.
The operation time of the fuel cell refers to the time when various operation activities occur inside the fuel cell. The ambient temperature refers to the temperature of the external environment in which the fuel cell is located, and is related to the geographical location in which the fuel cell is located, weather, and the like. When the stack cooling system of the fuel cell is operated, it is necessary to record the temperature of the cooling water entering the stack at each time and record the output current at each time when the output current is generated. When the warm-up operation is performed, the current density at each moment in the warm-up operation can be recorded, so that the warm-up current densities at different running moments can be obtained.
The magnitude of the current density is related to the hydrogen pressure and the air pressure input during the reaction in the cell stack. The more violent the reaction of hydrogen and air, the more the water is generated, and the higher the temperature inside the electric pile is, so that the temperature and humidity environment inside the electric pile is changed.
In the electric pile, the high-temperature gas during the reaction is discharged out of the electric pile, so that the redundant steam in the electric pile is discharged out of the electric pile, and the steam in the electric pile is further reduced. In this embodiment, by recording the warm-up current density of the electric pile, the temperature and humidity conditions inside the electric pile during warm-up can be reflected, and a basis is provided for the subsequent anode purging operation.
Step 130, determining a warmup state of the fuel cell when the output current is pulled based on the operation time, the temperature of the cooling water entering the electric pile at different operation moments and the output current at different operation moments.
The warmup state includes a state in which warmup is completed and a state in which warmup is not completed. In the present embodiment, whether the warm-up operation is completed may be determined by analyzing the operation time, the temperature of the cooling water entering the stack at different operation times, and the output current at different operation times.
In some embodiments, the output current at different operation moments can be analyzed to determine whether the output current is pulled or not, if the output current is continuously increased, the operation time can be analyzed, the operation time is compared with the standard operation time, if the operation time exceeds the standard operation time, the temperature inside the electric pile can be considered to be lower, the electric pile takes more time to complete the output of the specific power, and further it can be determined that the warm-up operation is not completed, and the warm-up state of the fuel cell when the output current is pulled or loaded is the state that the warm-up is not completed. The standard operating time period may be obtained based on a historical operating record of the fuel cell.
In other embodiments, as shown in fig. 2, step 130, determining the warmed-up state of the fuel cell when the output current is pulled mainly includes step 131, step 132, and step 133 based on the operation time, the temperature of the cooling water entering the stack at different operation times, and the output current at different operation times.
Step 133, determining a warmup state when the output current is pulled to be a warmup completion state when the target temperature is greater than the first temperature value; when the target temperature is less than or equal to the first temperature value, the warmed-up state at the time of the pull-up of the output current is determined as a state in which the warmup is not completed.
In the present embodiment, at the first time when the output current is generated by the fuel cell, the output current of the fuel cell starts to increase to carry out the pulling load according to the operation characteristics of the fuel cell.
Since the fuel cell can warm up the stack by heating the cooling water of the cooling system during the warming up, the target temperature of the cooling water that enters the stack at the first time can be determined.
The first temperature value may be set according to the actual situation. The target threshold may be slightly greater than the optimal reaction temperature at which power output begins inside the stack.
Under the condition that the target temperature is larger than the first temperature value, it can be stated that the cooling water entering the electric pile has realized the warmup, so that the temperature inside the electric pile is suitable for reaction, and then the warmup state when the output current is pulled and loaded can be determined as the warmup state.
When the target temperature is less than or equal to the first temperature value, it may be indicated that the cooling water entering the electric pile has not yet been warmed up, and the temperature inside the electric pile is not yet the optimal temperature, and further the warmed-up state when the output current is pulled up may be determined as the state in which the warmup is not completed.
In this embodiment, by detecting the temperature of the cooling water entering the electric pile during the output current loading process, it is possible to accurately identify whether the electric pile is warmed up, and it is possible to accurately identify the abnormal warming up phenomenon under the abnormal operation condition, that is, the electric pile is not warmed up, and it is possible to determine the state in which the electric pile is not warmed up.
In step 140, when the warmed-up state at the time of pulling load of the output current is a state in which the warmed-up state is not completed, the first preset duration for purging the anode of the fuel cell is extended again by the first target duration to purge the anode.
When the electric pile works in a state that the electric pile is not completely warmed up, more condensed water is generated in the electric pile, and a considerable part of condensed water and steam cannot be discharged out of the electric pile together with waste gas because of lower temperature in the electric pile during reaction, so that more water exists in the fuel cell electric pile when the electric pile is started to operate next time, the influence of the residual excessive water is not considered in the purging process of the subsequent startup, and the residual part of water cannot be discharged out of the electric pile, so that the subsequent working performance of the electric pile is influenced and the material safety in the electric pile is endangered.
Therefore, in this embodiment, the first target period may be further extended based on the original purge time, that is, the first preset time, so that the residual excessive moisture in the stack may be discharged out of the stack as much as possible.
It should be noted that the first preset duration is an anode standard purge time of the fuel cell under the shutdown condition. The first target duration is determined based on the operating time, the temperature of the cooling water entering the stack at different operating times, and the output current and the heater current density at different operating times.
The standard purge time of the anode can be obtained by modeling according to parameters such as standard warm-up time, running time, warm-up current density and the like.
Similarly, for the first target duration, taking into consideration factors such as the quantity of moisture generated by different operation durations, the influence of cooling water temperature entering the electric pile at different operation moments on the temperature and humidity inside the electric pile, the influence of output current and electric heater current density at different operation moments on the pressure of hydrogen and air reflected by the entering electric pile, the influence of the pressure of hydrogen and the air reflected by the entering electric pile on the moisture carried away by exhaust gas discharged from the electric pile, and the like, modeling can be performed by taking the operation time, the cooling water temperature entering the electric pile at different operation moments, and the output current and the electric heater current density at different operation moments as parameters, so that the size of the first target duration is marked.
In some embodiments, in the case that the warmed-up state when the pull load occurs in the output current is a state in which the warmup is not completed, the first preset duration of purging the anode of the fuel cell is extended by a first target duration, so that after purging the anode, the anode purging control method of the embodiment of the present invention further includes step 150.
Step 150, determining a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on the current temperature of the fuel cell, the ambient temperature, the target shutdown time and a temperature drop characteristic curve of the fuel cell at the ambient temperature under the condition that purging of the anode is completed; determining the magnitude relation between the second temperature value and the third temperature value; and in the case that the second temperature value is smaller than the third temperature value, after purging the anode, controlling the heating system of the fuel cell to heat the fuel cell so that the temperature of the fuel cell after the target shutdown time is greater than or equal to the third temperature value.
It will be appreciated that in the case where purging of the anode is completed, i.e., in the case where purging of the anode is completed for a first preset period of time and for a first target period of time, the second temperature value of the fuel cell at the ambient temperature after the target shutdown time may be determined based on the current temperature of the fuel cell, the ambient temperature, the target shutdown time, and the temperature drop characteristic of the fuel cell at the ambient temperature.
The target shutdown time is determined according to each historical shutdown time of the fuel cell, and the target shutdown time is used for reflecting shutdown time of the electric pile so as to calculate the temperature drop amplitude of the electric pile in the shutdown time.
In this embodiment, a temperature drop characteristic curve of the fuel cell at the current ambient temperature may be determined according to thermal characteristic parameters such as a material heat transfer coefficient and a heat transfer area of the stack, and an estimated temperature of the fuel cell at the next power-on time may be determined according to the current temperature of the fuel cell and the target power-off time, that is, a second temperature value of the fuel cell at the ambient temperature after the target power-off time is determined.
On the basis, the magnitude relation between the second temperature value and the third temperature value is further determined. After the purged electric pile is turned off for the target time under the current ambient temperature and ambient humidity, if the second temperature value is larger than or equal to the third temperature value, the third temperature value is higher, and water vapor penetrating and diffusing into the fuel cell from the environment is little, namely the inside of the electric pile contains less water when being turned on next time.
It is understood that the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity.
Under the condition that the second temperature value is smaller than the third temperature value, the electric pile may be affected by the low-temperature environment in the shutdown state, and water vapor diffuses into the electric pile to cause the electric pile to contain more water before the startup, so that the heating system of the fuel cell can be controlled to heat the fuel cell, and the temperature of the fuel cell after the target shutdown time is greater than or equal to the third temperature value.
The heating system of the fuel cell may be a heating plate disposed outside the fuel cell, and the electric energy of the heating system may be supplied by an external power source, or the heating system may store heat by absorbing heat when the electric pile needs to dissipate heat through a certain electrochemical reaction, and may release heat by performing a reverse reaction when the electric pile needs to be heated.
In the embodiment, the electric pile in the shutdown state is heated in a lower temperature environment, so that the electric pile can be ensured not to generate more water in the next startup working condition, and the subsequent normal operation of the electric pile is ensured.
According to the anode purging control method provided by the embodiment of the invention, the operation parameters of the high-power fuel cell in the operation process are monitored, the abnormal warming-up of the fuel cell in the operation process after the fuel cell is started is accurately identified, the anode purging time of the electric pile is prolonged by combining the thermal characteristics of cooling water, hydrogen, air and moisture in the electric pile, the water content in the electric pile is reduced, the working performance of the fuel cell in the working condition of the next stage is further improved, and the service life requirement of a fuel cell system is further met.
Of course, in some embodiments, after determining the warm state of the fuel cell when the output current is pulled, based on the operation time, the temperature of the cooling water entering the stack at different operation times, and the output current at different operation times, the anode purge control method of the embodiment of the present invention further includes: when the warmed-up state at the time of the pull-up of the output current is a state in which the warming-up is completed, the anode of the fuel cell is purged for a first preset period of time.
Under the condition that the warm-up is completed when the current is carried, the situation that excessive moisture can be left in the electric pile due to abnormal temperature and humidity is avoided, so that the anode of the fuel cell is purged according to the calibrated first preset time length when the electric pile is shut down, the moisture of the anode of the electric pile can be discharged as much as possible, and the purged hydrogen consumption can be saved as much as possible.
In some embodiments, in a case where a warmed-up state when the output current is pulled is a state in which the warmed-up is not completed, the first preset duration of purging the anode of the fuel cell is extended by a first target duration to purge the anode, and the anode purge control method according to the embodiment of the present invention further includes: acquiring the hydrogen pressure and the air pressure in a bipolar plate of the fuel cell; based on the hydrogen pressure and the air pressure, the operating parameters of the hydrogen pressure valve and the air compressor of the fuel cell are adjusted so that the pressure difference between the hydrogen pressure purged to the anode and the air pressure at the cathode is less than a pressure difference preset value.
It will be appreciated that the opening of the hydrogen pressure valve may be adjusted to effect adjustment of the pressure of hydrogen into the bipolar plate of the fuel cell. In the case where the opening degree of the hydrogen pressure valve becomes large, the pressure of hydrogen entering the bipolar plate of the fuel cell can be increased; in the case where the opening degree of the hydrogen pressure valve becomes smaller, the pressure of hydrogen entering the bipolar plate of the fuel cell can be reduced.
In this embodiment, the hydrogen pressure and the air pressure in the bipolar plate of the fuel cell during the purging process can be monitored, and the working parameters of the hydrogen pressure valve and the air compressor are continuously adjusted, so that the pressure difference between the hydrogen pressure purged to the anode and the air pressure of the cathode is smaller than the preset pressure difference value, and further the reaction film in the bipolar plate is not damaged due to the overlarge air pressure difference, and the safety of the inside of the electric pile is ensured.
In some embodiments, after determining the current working condition and the pre-working condition of the fuel cell, the anode purge control method according to the embodiments of the present invention further includes: determining a purging state of the fuel cell when the fuel cell is shut down under the condition that the current working condition of the fuel cell is started and the front working condition is shut down; the purging state of the fuel cell when the fuel cell is shut down comprises a purging completion state and a purging incompletion state; and under the condition that the purging state of the fuel cell is in a purging incomplete state when the fuel cell is shut down, the second preset duration of purging the anode of the fuel cell is prolonged again to a second target duration, so as to purge the anode.
It can be understood that when the fuel cell is started, if the purging is interrupted accidentally under the pre-working condition, namely when the fuel cell is shut down, the moisture content in the anode of the fuel cell is too high, so that the subsequent operation of the electric pile is affected.
Therefore, in this embodiment, the second target period of time may be further prolonged based on the original purge time, that is, the second preset time, so that the residual excess moisture in the stack may be discharged out of the stack as much as possible.
It should be noted that the second preset duration is the standard purging time of the anode of the fuel cell under the starting working condition; the second target time period is determined based on a shutdown time period of the fuel cell and an ambient temperature.
The standard purge time of the anode can be obtained by modeling according to parameters such as standard warm-up time, running time, warm-up current density and the like.
Similarly, for the second target duration, the factors of the amount of the water diffused into the pile under different environmental temperatures and different shutdown durations are mainly considered, modeling can be performed under parameters of higher humidity conditions, lower environmental temperatures, longer shutdown duration and the like, and the size of the second target duration is further marked, so that the water in the pile anode is discharged as much as possible during startup.
In some embodiments, after determining the purge state of the fuel cell at shutdown, the anode purge control method of the embodiment of the present invention further includes: and when the purging state of the fuel cell when the fuel cell is shut down is the purging completion state, purging the anode of the fuel cell according to a second preset duration.
Under the condition that the purging state of the fuel cell is the purging completion state when the fuel cell is shut down, the problem that excessive moisture can be remained in the electric pile due to abnormal humidity is avoided, so that the anode of the fuel cell is purged according to the calibrated second preset time length when the fuel cell is shut down, the moisture of the anode of the electric pile can be discharged as much as possible, and the using amount of the purged hydrogen can be saved as much as possible.
The anode purge control device provided by the invention is described below, and the anode purge control device described below and the anode purge control method described above can be referred to correspondingly.
As shown in fig. 3, the anode purge control device according to the embodiment of the present invention mainly includes a first processing module 310, a second processing module 320, a third processing module 330, a fourth processing module 340, and a fifth processing module 350.
The first processing module 310 is configured to determine a current working condition and a pre-working condition of the fuel cell, where the working conditions of the fuel cell include startup, shutdown, and operation;
the second processing module 320 is configured to determine an operation parameter of the fuel cell when the current operating condition of the fuel cell is shutdown and the pre-operating condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering the electric pile under different operation moments, and the output current and the electric density of the heating machine under different operation moments;
the third processing module 330 is configured to determine a warmup state of the fuel cell when the output current is pulled based on the operation time, the temperature of the cooling water entering the stack at different operation times, and the output current at different operation times; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed;
The fourth processing module 340 is configured to, in a case where the warmed-up state when the pull load occurs in the output current is a state in which the warmed-up state is not completed, extend a first preset duration for purging the anode of the fuel cell by a first target duration to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the operation time, the temperature of cooling water entering the electric pile at different operation moments, and the output current and the heating current density at different operation moments;
the fifth processing module 350 is configured to determine, when purging the anode is completed, a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on the current temperature of the fuel cell, the ambient temperature, the target shutdown time, and a temperature drop characteristic curve of the fuel cell at the ambient temperature; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature; and in the case that the second temperature value is smaller than the third temperature value, after purging the anode, controlling the heating system of the fuel cell to heat the fuel cell so that the temperature of the fuel cell after the target shutdown time is greater than or equal to the third temperature value.
According to the anode purging control device provided by the embodiment of the invention, the operation parameters of the high-power fuel cell in the operation process are monitored, the abnormal warming-up of the fuel cell in the operation process after the fuel cell is started is accurately identified, the anode purging time of the electric pile is prolonged by combining the thermal characteristics of cooling water, hydrogen, air and moisture in the electric pile, the water content in the electric pile is reduced, the working performance of the fuel cell in the working condition of the next stage is further improved, and the service life requirement of a fuel cell system is further met.
In some embodiments, the third processing module 330 is further configured to determine a time at which the output current is initially greater than zero during the run time as the first time; determining a target temperature of cooling water entering the stack at a first time; when the target temperature is greater than the first temperature value, determining a warmup state when the output current is pulled as a warmup completion state; when the target temperature is less than or equal to the first temperature value, the warmed-up state at the time of the pull-up of the output current is determined as a state in which the warmup is not completed.
In some embodiments, the fourth processing module 340 is further configured to purge the anode of the fuel cell for a first preset duration in a case where the warmed-up state when the pull-up of the output current occurs is a state in which the warming-up is completed.
In some embodiments, the fourth processing module 340 is also used to obtain the hydrogen pressure and the air pressure within the fuel cell bipolar plate; based on the hydrogen pressure and the air pressure, the operating parameters of the hydrogen pressure valve and the air compressor of the fuel cell are adjusted so that the pressure difference between the hydrogen pressure purged to the anode and the air pressure at the cathode is less than a pressure difference preset value.
In some embodiments, the anode purge control device according to the embodiments of the present invention further includes a sixth processing module, where the sixth processing module is configured to determine a purge state of the fuel cell when the fuel cell is turned off, when a current working condition of the fuel cell is turned on and a front working condition of the fuel cell is turned off; the purging state of the fuel cell when the fuel cell is shut down comprises a purging completion state and a purging incompletion state; under the condition that the purging state of the fuel cell is in a purging incomplete state when the fuel cell is shut down, the second preset duration of purging the anode of the fuel cell is prolonged again to purge the anode; the second preset duration is the standard purging time of the anode of the fuel cell under the starting working condition; the second target time period is determined based on a shutdown time period of the fuel cell and an ambient temperature.
In some embodiments, the sixth processing module is further configured to purge the anode of the fuel cell for a second preset duration when the purge state of the fuel cell at shutdown is a purge complete state.
Fig. 4 illustrates a physical schematic diagram of an electronic device, as shown in fig. 4, which may include: processor 410, communication interface (Communications Interface) 420, memory 430 and communication bus 440, wherein processor 410, communication interface 420 and memory 430 communicate with each other via communication bus 440. The processor 410 may invoke logic instructions in the memory 430 to perform an anode purge control method comprising: determining the current working condition and the front working condition of the fuel cell, wherein the working conditions of the fuel cell comprise startup, shutdown and operation; determining the operation parameters of the fuel cell under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering the electric pile under different operation moments, and the output current and the electric density of the heating machine under different operation moments; determining a warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed; when the warmup state of the output current is a state of incomplete warmup, the first preset duration of purging the anode of the fuel cell is prolonged again to a first target duration, so as to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the operation time, the temperature of cooling water entering the electric pile at different operation moments, and the output current and the heating current density at different operation moments; under the condition that purging of the anode is completed, determining a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on the current temperature of the fuel cell, the ambient temperature, the target shutdown time and a temperature drop characteristic curve of the fuel cell at the ambient temperature; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity; and in the case that the second temperature value is smaller than the third temperature value, after purging the anode, controlling the heating system of the fuel cell to heat the fuel cell so that the temperature of the fuel cell after the target shutdown time is greater than or equal to the third temperature value.
Further, the logic instructions in the memory 430 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The invention also provides a fuel cell comprising a stack and an electronic device as described above.
The invention also provides a new energy vehicle which comprises the fuel cell.
The present invention also provides a computer program product comprising a computer program storable on a non-transitory computer readable storage medium, the computer program when executed by a processor being capable of performing the anode purge control method provided by the methods described above, the method comprising: determining the current working condition and the front working condition of the fuel cell, wherein the working conditions of the fuel cell comprise startup, shutdown and operation; determining the operation parameters of the fuel cell under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering the electric pile under different operation moments, and the output current and the electric density of the heating machine under different operation moments; determining a warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed; when the warmup state of the output current is a state of incomplete warmup, the first preset duration of purging the anode of the fuel cell is prolonged again to a first target duration, so as to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the operation time, the temperature of cooling water entering the electric pile at different operation moments, and the output current and the heating current density at different operation moments; under the condition that purging of the anode is completed, determining a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on the current temperature of the fuel cell, the ambient temperature, the target shutdown time and a temperature drop characteristic curve of the fuel cell at the ambient temperature; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity; and in the case that the second temperature value is smaller than the third temperature value, after purging the anode, controlling the heating system of the fuel cell to heat the fuel cell so that the temperature of the fuel cell after the target shutdown time is greater than or equal to the third temperature value.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which when executed by a processor is implemented to perform the anode purge control method provided by the above methods, the method comprising: determining the current working condition and the front working condition of the fuel cell, wherein the working conditions of the fuel cell comprise startup, shutdown and operation; determining the operation parameters of the fuel cell under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering the electric pile under different operation moments, and the output current and the electric density of the heating machine under different operation moments; determining a warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed; when the warmup state of the output current is a state of incomplete warmup, the first preset duration of purging the anode of the fuel cell is prolonged again to a first target duration, so as to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the operation time, the temperature of cooling water entering the electric pile at different operation moments, and the output current and the heating current density at different operation moments; under the condition that purging of the anode is completed, determining a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on the current temperature of the fuel cell, the ambient temperature, the target shutdown time and a temperature drop characteristic curve of the fuel cell at the ambient temperature; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity; and in the case that the second temperature value is smaller than the third temperature value, after purging the anode, controlling the heating system of the fuel cell to heat the fuel cell so that the temperature of the fuel cell after the target shutdown time is greater than or equal to the third temperature value.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An anode purge control method, comprising:
determining the current working condition and the front working condition of a fuel cell, wherein the working conditions of the fuel cell comprise startup, shutdown and operation;
determining the operation parameters of the fuel cell under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering a pile under different operation moments, and the output current and the electric density of a heating machine under different operation moments;
determining a warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed;
When the warmup state of the output current is a state of incomplete warmup, the first preset duration of purging the anode of the fuel cell is prolonged again by a first target duration so as to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the running time, the temperature of cooling water entering the electric pile at different running moments, and the output current and the heating current density at different running moments;
determining a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on the current temperature of the fuel cell, the ambient temperature, a target shutdown time, and a temperature drop characteristic curve of the fuel cell at the ambient temperature under the condition that purging of the anode is completed; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity; and controlling a heating system of the fuel cell to heat the fuel cell after purging the anode under the condition that the second temperature value is smaller than the third temperature value, so that the temperature of the fuel cell after the target shutdown time is larger than or equal to the third temperature value.
2. The anode purge control method according to claim 1, wherein the determining a warmed-up state of the fuel cell when the output current is pulled based on the operation time, a temperature of cooling water entering the stack at different operation times, and an output current at different operation times, comprises:
determining a time when the output current is greater than zero for the first time in the running time as a first time;
determining a target temperature of cooling water entering the stack at the first time;
when the target temperature is greater than a first temperature value, determining a warmup state when the output current is pulled to be a warmup completion state; and determining a warmup state when the output current is pulled as a state in which warmup is not completed when the target temperature is less than or equal to the first temperature value.
3. The anode purge control method according to claim 1, characterized in that after the warm-up state of the fuel cell at the time when the pull-up of the output current occurs is determined based on the operation time, the temperature of the cooling water entering the stack at different operation times, and the output current at different operation times, the method further comprises:
And when the warmed-up state when the output current is pulled is a warmed-up state, purging the anode of the fuel cell according to the first preset duration.
4. The anode purge control method according to claim 1, wherein, in the case where the warmed-up state at the time of occurrence of pull-up of the output current is a state in which the warmup is not completed, a first preset time period for purging the anode of the fuel cell is extended by a first target time period to purge the anode, further comprising:
acquiring the hydrogen pressure and the air pressure in the bipolar plate of the fuel cell;
and adjusting working parameters of a hydrogen pressure valve and an air compressor of the fuel cell based on the hydrogen pressure and the air pressure so that a pressure difference between the hydrogen pressure purged to the anode and the air pressure of the cathode is smaller than a pressure difference preset value.
5. The anode purge control method according to any one of claims 1-4, wherein after the determining of the current operating condition and the pre-operating condition of the fuel cell, the method further comprises:
determining a purging state of the fuel cell when the fuel cell is shut down under the condition that the current working condition of the fuel cell is started and the front working condition is shut down; the purging state of the fuel cell when the fuel cell is shut down comprises a purging completion state and a purging incompletion state;
Under the condition that the purging state of the fuel cell is in a purging incomplete state when the fuel cell is shut down, a second preset duration of purging the anode of the fuel cell is prolonged again to a second target duration, so that the anode is purged; the second preset duration is the standard purging time of the anode of the fuel cell under the starting working condition; the second target duration is determined based on a shutdown duration of the fuel cell and an ambient temperature.
6. The anode purge control method according to claim 5, wherein after said determining a purge state of the fuel cell at shutdown, the method further comprises:
and under the condition that the purging state of the fuel cell when the fuel cell is shut down is the purging completion state, purging the anode of the fuel cell according to the second preset duration.
7. An anode purge control device, comprising:
the first processing module is used for determining the current working condition and the front working condition of the fuel cell, wherein the working conditions of the fuel cell comprise startup, shutdown and operation;
the second processing module is used for determining the operation parameters of the fuel cell under the condition that the current working condition of the fuel cell is shutdown and the front working condition is operation; the operation parameters comprise the operation time of the fuel cell, the ambient temperature, the temperature of cooling water entering a pile under different operation moments, and the output current and the electric density of a heating machine under different operation moments;
The third processing module is used for determining a warmup state of the fuel cell when the output current is pulled and loaded based on the operation time, the temperature of cooling water entering the electric pile at different operation moments and the output current at different operation moments; the warmup state includes a state in which warmup is completed and a state in which warmup is not completed;
a fourth processing module, configured to, when a warmup state when the output current is pulled is a state that is not completed, extend a first preset duration for purging an anode of the fuel cell by a first target duration, so as to purge the anode; the first preset duration is the standard purging time of the anode of the fuel cell under the shutdown working condition; the first target duration is determined based on the running time, the temperature of cooling water entering the electric pile at different running moments, and the output current and the heating current density at different running moments;
a fifth processing module configured to determine, when purging of the anode is completed, a second temperature value of the fuel cell at the ambient temperature after the target shutdown time based on a current temperature of the fuel cell, the ambient temperature, a target shutdown time, and a temperature drop characteristic curve of the fuel cell at the ambient temperature; the target shutdown time is determined according to each historical shutdown time of the fuel cell; determining the magnitude relation between the second temperature value and the third temperature value; the third temperature value is determined based on the water vapor permeation quantity of the fuel cell at the ambient temperature and the ambient humidity; and controlling a heating system of the fuel cell to heat the fuel cell after purging the anode under the condition that the second temperature value is smaller than the third temperature value, so that the temperature of the fuel cell after the target shutdown time is larger than or equal to the third temperature value.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the anode purge control method of any one of claims 1 to 6 when the program is executed.
9. A fuel cell comprising a stack and the electronic device of claim 8.
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